-LRB- CNN -RRB- -- Director Oliver Stone was recently a speaker at a JFK assassination conference in Pittsburgh , and he was left wondering why the symposium was n't getting a lot of love .

After all , it had assembled experts renowned in the field , including forensic pathologist Cyril Wecht and investigator Josiah `` Tink '' Thompson -LRB- `` who did the original bullet work '' -RRB- .

`` I 'm here in Pittsburgh with 50 experts who really have done a lifetime of free work on this , '' Stone told CNN . `` It was in the paper here , but it should be front page news throughout the United States . I wish people would come here and cover this . ''

Stone , along with the rest of America , is revisiting President John F. Kennedy 's assassination on the 50th anniversary , which is why he 's just rereleased `` JFK '' on DVD and in select theaters .

Ever since the film 's release in 1991 , Stone says more evidence has been made available that reinforces his work , such as the report by the Assassination Records Review Board -LRB- ARRB -RRB- , `` which if anything , widens some of the loopholes found by the Warren Commission , '' and makes him more certain of the scenario presented in `` JFK . ''

`` There 's nothing in the movie that I would go back on , '' he said . Alternatively , he dismisses works such as Gerald Posner 's `` Case Closed , '' which he said was discredited .

Stone : We 're not all conspiracy theorists

In the film `` JFK , '' Stone tears apart the Warren Commission 's report that a single shooter -- Lee Harvey Oswald -- fired three shots from the sixth floor of the nearby book depository .

This is referred to as the `` magic bullet '' theory because of the time frame and trajectory required for a bullet to make the path and wounds that transpired .

Instead of Oswald as a shooter acting alone , a number of direct and indirect co-conspirators at the highest levels of government are posited in `` JFK . '' They include the CIA , the FBI , the Secret Service , then-Vice President Lyndon B. Johnson , as well as the mafia and the military-industrial complex , for a variety of combined motives .

Despite his scholarly approach , Stone feels he and like-minded others are lumped together and dismissed as `` conspiracy theorists , '' when now , more than ever , `` we 've since learned as Americans that the government lies , extensively , '' he said , citing the lead-up to the war in Iraq , revelations of U.S. government secrets via WikiLeaks and the Edward Snowden/NSA scandal . `` Suddenly the trust in government has receded considerably . ''

One JFK conspiracy theory that could be true

Yet when it comes to the JFK assassination , he says some people `` always dismiss the stuff as ` conspiracy theorizing , ' without ever knowing about it . A lot of the media who criticize these films , or criticize me , they 've never read anything , any of the countermaterial . ''

If people knew about those loopholes , Stone said , the single-shooter theory and the `` magic bullet '' theory `` fall apart , if anybody in their right mind looks at it , '' Stone said .

`` It angers me sometimes , to think of the degree of stupidity about Oswald and the Mannlicher-Carcano -LRB- rifle -RRB- on the sixth floor making these shots . It 's almost as if we do n't believe what we see with our own eyes in the Zapruder film . ''

Eyewitnesses who 've come forward in recent years also provide evidence that shots came from more than one location or angle . One such eyewitness , a Parkland Hospital surgeon who spoke at the conference , has become vocal about the wounds to Kennedy 's head .

Robert McClelland `` came out , finally , after being frightened all these years , '' Stone said , `` and said that the bigger wound was to the rear , to the right , and the cerebellum was practically falling out . ''

In addition to McClelland , Stone said `` the ARRB deposed 10 witnesses to this massive head wound . A lot of people are coming out and saying , ' I was there . I stared into his brain , which was spilling out the back of his head . ' This is so obvious , that it 's from more than one side . ''

Stone makes link to Cold War policies

Part of Stone 's `` Untold History of the United States '' series , also recently released on DVD , provides historical context in the chapter on JFK .

`` My best answer to people who would criticize anything we say in the ` JFK ' movie is to look at Chapter Six of ` Untold History , ' ` JFK : To the Brink , ' to understand the man , and the big picture of events , '' Stone said .

`` We look for the big changes that happen after his death . What did he achieve ? And what is the difference between him and Lyndon Johnson , who followed him , and the man who preceded him , Dwight Eisenhower ? You may not agree with some of our conclusions , but the facts are solid . We did n't make it up . ''

Amanpour : We are ` quite rightly obsessed ' with JFK , says historian

Stone explained that after Harry Truman and Eisenhower , Kennedy was the third president of a national security state with a Cold War mentality , and when his policy shifted away from that , he was `` removed . ''

`` A president gets killed in Dallas , and we go back to a Cold War mindset , we go back to a military-industrial reaction in all situations , '' Stone said .

`` It was certainly a reassertion of policies that existed after WWII , '' and even after the decline of the Soviet Union -LRB- `` the reason for the national security state '' -RRB- , the policies continue and `` even accelerate , to where we are now . And we are now locked into a system where we do n't seem to be able to break out of , where we 're the global security . We 're in charge of this empire , or whatever they call it . ''

This chain of events , described in `` Untold History , '' is a `` tragedy , '' Stone said . -LRB- This chapter is also included in the `` JFK '' reissue . -RRB-

Most of the Kennedy clan keeps its distance

Because `` JFK '' was `` such a controversial film , Stone said most of the extended Kennedy clan `` wanted to stay away from it .

`` I think they 've been very circumspect about this , because they lost two brothers , Robert and John , and it was very painful for them . ''

However , John F. Kennedy Jr. did approach the director to discuss the film and Stone 's theories , he said .

`` I did speak with him many years ago , before he died , '' the director said . `` He came to see me . He was interested in what happened , in my thoughts about what happened , '' which resulted in a piece for the conspiracy issue of `` George '' magazine back in 1998 .

`` I think conspiracies go on all the time , '' Stone said . `` I think accidents do , too . Random accidents and conspiracies have existed side by side for centuries , definitely . It 's part of life . I 'm not an innocent in that regard . ''

But ask him about non-JFK conspiracies of recent times , and he hesitates .

`` I 'm not really into that kind of thinking . But the biggest conspiracy of all for me is the one I grew up under , which was sprouted by my father , a Republican conservative , and the entire establishment of this country , which was , ` Hey , the Chinese and the Russians are in a conspiracy to take over the world ! ' McCarthy added to the conspiracy , but they were saying , ` They 're in our schools . They 're in our police force . They 're in our government . They 're your back-door neighbor . ' ''

`` That 's a conspiracy , OK ? George W. Bush was involved in a conspiracy that Iraq was involved in 9/11 . Come on ! And he sold that conspiracy idea to all these big-shot news organizations . Who 's kidding who ? Conspiracies exist if you can see them . People make up stories . They make the enemy bigger than they are . ''

Although Stone entertained the conspiracy talk with the anniversary and reissues , he did note that the one story about himself that he 'd like to see die is the one that makes him out to be the go-to conspiracy guy .

`` If you look at my body of work , every film is different . It 's confining if you 're always judging me by , ` Oh , is there a conspiracy in it ? ' That 's ridiculous ! '' For one thing , the film he had hoped to make but went to someone else was `` Evita . ''

As he laughed , `` events conspired against me . ''

Now-tea party congressman one of last to shake JFK 's hand

@highlight

Oliver Stone made a splash in 1991 with his film `` JFK ''

@highlight

The director is rereleasing the movie on the 50th anniversary of the assassination

@highlight

Stone stands by the theories in `` JFK , '' saying even more evidence supports his case now